EDKP 395 Lecture Notes - Lecture 11: Baroreceptor, Arteriole, Exercise Intensity

• School: McGill University
• Department: Kinesiology and Physical Ed
• Course: EDKP 395
• Professor: Mark Brawley

Document Summary

Bp to ~50% of normal; occl. has no effect on recovery of bp, hr and msna because no cr activation. Immediate in bp during exercise is due to combination of feedforward mechanisms which increase hr (pns withdrawal) and cardiac output; slower acting feedback mechanisms contribute by sns outflow, which acts to redistribute the cardiac output. The arterial baroreflex have carotid sinus receptors and receptors in the arotic arch as well as receptors in the heart and that are responding to changes and transmural pressure in response to. Feedforward and feedback mechanisms (i. e. , central command, muscle mechano- and metaboreflexes) reset the operating point (op) of the arterial baroreflex to a new higher level in an exercise intensity-dependent manner. Op is the point of maximum slope (or highest gain) of stimulus-response curve, and represents the map that the arterial baroreflex is trying to achieve/regulate to. Arterial (cid:271)arorefle(cid:454) resetti(cid:374)g (cid:272)reates a (cid:858)pressure error(cid:859)